With this information, you can calculate the quantity of miles per hour 640 feet per minute is equal to.

¿What is the inverse calculation between 1 mile per hour and 640 feet per minute?

Performing the inverse calculation of the relationship between units, we obtain that 1 mile per hour is 0.1375 times 640 feet per minute.

Which is the same to say that 640 feet per minute is 7.2727273 miles per hour.

Six hundred forty feet per minute equals to seven miles per hour. *Approximation

A mile per hour is zero times six hundred forty feet per minute. *Approximation